Em, using new units, two excellent ones that immediately come to mind within your budget are the Pioneer 1015 and the Yamaha 5890. Others include the Denon 2105, HK 335 and Onkyo 602. If a refurbished unit was bought, the possibilities would be expanded. All of these will provide audibly flawless amplification, so choose the features which are most important to you.

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Enjoy the music, not the equipment.